Underground utilities must endure stresses from loads, earth pressure, and internal pressure, which can cause deformation, bending, or compression, potentially leading to pipe network failure. Expanded polystyrene (EPS) geofoam, a lightweight geosynthetic, is commonly used in geotechnical engineering to reduce stresses on buried pipelines and culvert systems, especially in transportation infrastructure. EPS blocks are placed next to pipelines to reduce overburden and traffic-induced pressures. With well-defined compressibility characteristics, low imposed loads, lateral pressures, and a relatively low Poisson’s ratio, EPS is effective in protecting the buried infrastructure. There are various systems to protect buried utilities, including the embankment system, imperfect trench method, EPS block embraces upper pipe method, and EPS Post and Beam system, with the EPS Post and Beam system being the most effective. This paper discusses the effectiveness of the EPS Post and Beam system with headspace void in preventing pipeline ruptures due to traffic loads. Numerical analysis showed a significant reduction in pipeline deformation when protected by this system, having a headspace void of 2 times the pipe diameter, with a 75.4% reduction at the crown, 60.24% at the spring line, and 57.76% at the invert, compared to an unprotected pipeline. Additionally, results showed that the density of EPS blocks plays a crucial role in reducing deformation, with higher density blocks offering better support and minimizing deformation more effectively than lower density alternatives.